<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>Hi:<br>As far as i know, scilab does not have a symbolic function for an infinite summation...<br>Scilab is mainly intended for numeric calculation... so that functions are not yet implemented (perhaps in future versions).<br><br>If you want to do a symbolic calculation of the z-transfor you mentioned, and you want free software, i would use maxima... It's a powerfull symbolic software...<br><br>In maxima you could simply do<br><br>"sum(0.5^n*z^(-n), n, 1, inf), simpsum;"<br><br>then, you will have to input some conditions that you can see from the ROC of the z-transform... In this case maxima will ask:<br><br>"Is "2*abs(z)-1" positive, negative or zero?"<br><br>And i assume it's possitive given the function you want to transform... then you type <br><br>"p"<br><br>and you will get the answer...<br><br>If someone knows a toolbox for scilab to do this... please tell us!<br><br>I hope this is usefull for you<br><br><div>> Date: Wed, 12 Aug 2015 10:43:23 -0700<br>> From: doole93@gmail.com<br>> To: users@lists.scilab.org<br>> Subject: [Scilab-users] Symbolic computation in Scilab<br>> <br>> Greetings everyone.<br>> I'm completely new to Scilab so forgive my if this question is to simple. <br>> I need some sort of way to allow symbolic computation in Scilab. I need to<br>> execute commands like *symsum*, and for that, based on my current research,<br>> i need to install some kind of additional toolbox. I have Windows 8.1, and i<br>> have seen certain toolboxes which require explicitly Linux. I have a very<br>> limited amount of time to do a project in Scilab for z-transformation of<br>> discrete time signals (next 4-5 days) and so I really need to be able to<br>> execute little scripts like this one. <br>> <br>> syms n z;<br>> a = 0.5;<br>> x =(a)^n<br>> X = symsum (x*(z^(-n)),n ,0, %inf )<br>> disp (X," ans=")<br>> <br>> Any help, in form of some instructions, download link for additional<br>> software or anything else would be much appreciated.<br>> Thanks in advance<br>> <br>> <br>> <br>> --<br>> View this message in context: http://mailinglists.scilab.org/Symbolic-computation-in-Scilab-tp4032673.html<br>> Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com.<br>> _______________________________________________<br>> users mailing list<br>> users@lists.scilab.org<br>> http://lists.scilab.org/mailman/listinfo/users<br></div> </div></body>
</html>